I just got my 20v blacktop running too, a very exciting moment indeed.

Um to be honest, it's pretty straight forward. For the injectors it's 4 connectors in a row on the engine harness in the intake side, shouldn't be hard to find.

The ignitor is a black plug kina flat in shape with like 6 or 7 wires going to it. Just take your ignitor and try to find a connector that matches it.

Same thing with the ecu, should be at the end of your engine harness, it's 3 big plugs one is 26 pin one is a 12 pin and one is a 20 pin....or something close to those numbers....

If you were able to install a 20v in a car, i think you should be able to figure out a couple connectors. It's not hard take your time, just a big game of 'what's not plugged in, and where does it go'.

If all of the above has been taken care of, and you have put the BT engine into an AE86, you need to look for this plug...

This large squar(ish) plug is located high on the firewall behind the engine, and connects the dash harness to the engine harness. The black/orange wire from pin #2 supplies 12V from the keyswitch for the injectors and ignition.

The ECU gets switched 12V (B and B1) from the EFI Main Relay in the underhood fusebox, and a constant 12V (Batt) from the EFI fuse. If you haven't ripped the dash harness out of the car, these three wires will be found in the AE86 14-pin ECU plug.

Have fun

Cheers... jondee86

Give a person a fish, they eat for a day. Suggest they search before posting, and they learn a skill for a lifetime.

I'm confused about if I'm missing anything to fire it up I got the b1 b from ecu to 12v all grounds to earth from ecu what else needs 12v to get spark and fuel pump got it to 12v I'm doing it to a push button for now

Last edited by saigon on Sun Jun 18, 2017 10:36 am, edited 1 time in total.

The ECU doesn't really supply 12V to anything. The B and B1 power up the ECU and allow it to supply 5V to sensors like TPS and water temperature, and control relays. The constant 12V on BATT keeps the ECU alive when the key is OFF, just like the memory wire on your radio.

Anything that needs a decent amount of current like the injectors and ignition get 12V from the keyswitch, which gets power from the battery without going near the ECU. The ECU grounds the injectors to fire them, it does not give them power. The fuel pump gets power from the battery via the Circuit Opening Relay which is controlled by the ECU.

If you want to have a "start" pushbutton, the only thing it can do is supply power to the starter solenoid; direct or via a relay. You still need to have the key switch to turn ON to supply 12V to the injectors and ignition... if you have them wired up to work like OEM.

Cheers... jondee86

Give a person a fish, they eat for a day. Suggest they search before posting, and they learn a skill for a lifetime.

I think a have a few wires left to identify 3 brown wires .. 3 black with white line and dots white and 1 fat black with white line and insulated and small wire white wire in it .. those I don't know what they are thanks again

Trouble shooting my wiring got everything wired car cranks I check all grounds but not getting spark from coil . Swap to a different coil still no spark . Silvertop with bt ecu in an 82 corolla hardtop any help thanks

Have you 12V on the black/white wire at the coil and igniter with the key in the run/on position?A quick check to see if the ecu is powered up is check for 5V on the yellow wire of the MAP sensor and TPS sensor.